The decommissioned Van Allen Probe A is making an uncontrolled, fiery return to Earth tonight, ending a decade-long mission with a high-speed atmospheric burn.
A 1,300-pound NASA satellite is currently screaming toward Earth, ending its 14-year run with a fiery, unguided plunge through the atmosphere.
Van Allen Probe A, a veteran spacecraft that spent years diving through the planet’s harshest radiation belts, has finally run out of altitude. U.S. Space Force trackers expect the craft to hit the atmosphere around 7:45 p.m. EDT. But because the reentry is uncontrolled, nobody can say exactly where the debris will land.
Most of the 600-kilogram machine will vaporize into ash and streak across the sky like a synthetic fireball.
Still, NASA admits a few hardy components—likely titanium tanks or structural ribs—could survive the 3,000-degree heat. These blackened fragments are headed for the surface at terminal velocity.
Should you be looking for a helmet?
NASA puts the odds of a piece of this satellite hitting a person at about 1 in 4,200. On a planet of 8 billion people, those are better odds than winning the Powerball, but significantly higher than the risk of being struck by a natural meteorite.
“The risk of harm coming to anyone on Earth is low,” NASA officials said in a brief update.
But “low” isn’t “zero.”
The probe’s descent happened much faster than anyone predicted back in 2012. Initial math suggested the satellite would stay aloft until 2034. But the sun had other plans.
Recent solar maximum activity—the peak of the sun’s 11-year cycle—pushed Earth’s upper atmosphere outward. This creates “atmospheric drag,” a cosmic headwind that acts like sandpaper on a satellite’s orbit. For Van Allen Probe A, that drag turned a slow drift into a terminal dive.
Launched in August 2012, the probe and its twin, Probe B, were built to do the jobs other satellites avoid. They spent seven years flying through the Van Allen radiation belts, regions of high-energy particles that can fry standard electronics.
The data they sent back changed how we protect GPS satellites and astronauts from solar storms.
The probes were finally decommissioned in 2019 when they ran out of fuel. Without propellant, the satellites couldn’t keep their solar panels pointed at the sun. They went dark, becoming two more tons of high-tech drift-wood in the orbital sea.
Now, the first of the pair is coming home the hard way.
The reentry highlights a growing headache for space agencies: the “design-for-demise” problem. Older satellites like the Van Allen probes weren’t built with modern deorbiting tech. They simply stay up until gravity and solar weather drag them down.
And as the orbit gets more crowded, these “uncontrolled” arrivals are becoming more frequent.
Space Force monitors at the 18th Space Defense Squadron are currently tracking the probe’s final laps. They’ve warned that the timing could shift by 24 hours in either direction.
When it does hit, the show will be over in minutes.
If the debris hits the ocean, it becomes a permanent part of the seafloor. If it hits land, it’s a legal liability for the U.S. government under international space treaties.
The twin spacecraft, Probe B, is still up there, circling silently. It isn’t expected to follow its partner into the fire until at least 2030.
For now, the world is waiting on the tracking data to confirm if Van Allen Probe A survived its final mission—or if it simply blinked out of existence over some empty stretch of the Pacific.
